Removed and replaced pressure regulator valve with the shut off valve. Repaired water line leak in the garage. Flushed both water heaters and replaced the gas control valve on the left water heater. Turned on the water and pressurized the system, reignited the water heaters. Replaced the thermal expansion tank and properly mounted to a stud. The water pressure to the home is now 65 psi. Tested with no leaks.